Here's the key conclusion: "Our results suggest that there may be an increase in risk of glioma in the most exposed area of the brain among long-term and heavy users of mobile phones." It goes on to caution that these results are "uncertain" and need to be replicated. The authors come from five of the 13 countries participating in the Interphone project. Another paper from seven of the Interphone countries has also just appeared —it finds no suggestion of a brain tumor risk.

OEM also released a second paper from the Cardis group today. This latter work details the factors that influence total RF dose at the location of the brain tumor. They are: the communication system and frequency band of the phone, tumor location and, of course, the amount of actual use. Interestingly, other factors that have long been thought as being important, for instance differences between urban and rural as well as between indoor and outdoor use were found to have "a relatively minor influence."